Guildline Instruments 6623A Series of High Current Range Extenders introduces new patented designs and the best in modularity of any Range Extender ever produced. The 6623A Series consists of a family of range extenders, with available current outputs from 3 ampere to 10,000 ampere.

The 66252 DMM Switch is a unique option for 6625A Resistance Measurement Systems. This very high isolation switch allows the 6625A System Resistance Standards to be used for both Measurement and Source Applications without having to disconnect and reconnect wires.